Peter writes:
[...]
> I have not found any suitable term specifically denoting the distinction
> I wanted to make, so I adapted the term "macroevolution" for this (is
> this a coaptation? ;-)). Does anyone have a better suggestion?
[...]

Try "macromolecular functional emergence", or if you want to create
a new word try "macrolon evolution" (I thought German was a language
that happily created new, compound words -- try something in German
and then translate it into English).

But please use anything but macroevolution, particularly when macro-
evolutionary events such as the emergence of the vertebrates are being
discussed. It's way too confusing otherwise.